Alpheus Todd

Alpheus Todd (July 30, 1821 – January 22, 1884) was an English born Canadian librarian and constitutional historian, most notable for his publications on parliamentary government.

Todd was born in London, England, the son of an author, Henry Cooke Todd. His family emigrated to York, Upper Canada in 1833. The following year, York was incorporated as the city of Toronto; Todd, though young, produced an Engraved Plan of the City of Toronto, which brought him to the attention of the prominent lawyer, Robert Baldwin Sullivan. In 1835, Sullivan helped Todd obtain employment in the library of the House of Assembly of Upper Canada; in 1836 he became assistant librarian. Drawing on his experience in the House of Assembly's library and a keen interest in British parliamentary practice and its application in Canada and other British colonies, Todd published The Practice and Privileges of the Two Houses of Parliament in 1840. When, in 1841, Upper and Lower Canada were merged, Todd was appointed assistant librarian to the Legislative Assembly of the united province, which adopted his Practice and Privileges as an official guide for members. In the 1881 Birthday Honours, Todd was created a companion of the Order of St Michael and St George (CMG) on the recommendation of the Marquess of Lorne, and was awarded an honorary LLD by Queen's College, Kingston. He was a founding member of the Royal Society of Canada in 1882. Todd died suddenly at Ottawa on January 22, 1884.

Todd married Sarah Anne St John in 1845. Together, they had one daughter and four sons, one of whom, Arthur Hamlyn Todd, published second editions of his father's two works on Parliamentary Government, and left an unpublished life of him.